A four-year field experiment was conducted to study the effects of different fertilization practices on soil total organic carbon (TOC), watersoluble organic carbon (WSOC), easily oxidizable organic carbon (EOC), and particle organic carbon (POC) in paddy field of white soil. The fertilization treatments included chemical fertilizer, chemical fertilizer plus farmyard manure, chemical fertilizer plus wheat straw, and chemical fertilizer plus green manure. The results showed that, compared with chemical fertilizer, the amendment of organic manure significantly increased the contents of TOC and labile organic carbon (LOC), and the highest contents of TOC, EOC and POC were found in chemical fertilizer plus wheat straw treatment, with increases of 19.6%, 67.4% and 15.7%, respectively. The content of WSOC in chemical fertilizer plus farmyard manure treatment was highest, with an increase of 60.9% as compared to the control. Different fertilization practices had greater effects on the proportion of EOC than on that of WSOC and POC. Compared with single chemical fertilizer, the amendments of wheat straw, farmyard manure and green manure significantly increased the carbon management index (CMI) by 17.6%-85.2%. Correlation analysis showed the relationships between TOC, CMI and LOC were significant or extremely significant, with correlation coefficients of 0.691-0.824 and 0.593-0.803, respectively. Different organic carbon components and CMI were significantly related to available nitrogen and potassium, while only WSOC was significantly related to available phosphorus, with a correlation coefficient of 0.816. Therefore, the amendment of organic manure can increase the contents of TOC, LOC and CMI in white soil. Compared with EOC and POC, WSOC may be more sensitive to the changes of fertilization practices in white soil.